Vehicle control system and vehicle control device

1. A vehicle control system comprising: a first vehicle control device used in a first vehicle; and a second vehicle control device used in a second vehicle, wherein the first vehicle control device includes, a first vehicle information acquisition portion acquiring first vehicle information based on which the second vehicle control device in the second vehicle starts a vehicle control against the first vehicle, a vehicle packet generation portion acquiring a first time indicating a time when the first vehicle information is acquired and generating a first vehicle packet including the first time and the first vehicle information, and a first vehicle transmission portion transmitting the first vehicle packet, the second vehicle control device includes, a second vehicle reception portion receiving the first vehicle packet, a reception determining portion acquiring a signal received by the second vehicle reception portion and successively determining whether the first vehicle packet is received, a second time acquisition portion acquiring a second time indicating a time when the reception determining portion determines that the first vehicle packet is received, a delay calculation portion calculating a communication delay time that is a difference between the first time included in the first vehicle packet received by the second vehicle reception portion and the second time acquired by the second time acquisition portion, and a second vehicle control portion performing a delay considering control that is set by changing a delay ignoring control based on the communication delay time, the delay ignoring control being the vehicle control set based on the first vehicle information when assuming that the first time and the second time are same, the first vehicle information acquisition portion acquires first vehicle track information as the first vehicle information, the first vehicle track information being information for determining a first vehicle estimated track that is a future track of the first vehicle, and the second vehicle control portion determines the first vehicle estimated track based on the first vehicle track information included in the first vehicle packet received by the second vehicle reception portion, determines a second vehicle estimated track that is a feature track of the second vehicle, determines whether there is a possibility of a collision between the first vehicle and the second vehicle based on the first vehicle estimated track and the second vehicle estimated track, and operates in a delay considering mode in which the second vehicle control portion is allowed to perform the delay considering control in response to a determination that there is the possibility of the collision between the first vehicle and the second vehicle.

2. The vehicle control system according to claim 1 , wherein when the second vehicle control portion determines that there is the possibility of the collision between the first vehicle and the second vehicle, the second vehicle control portion performs, as the delay considering control, an attention-calling control to call attention of a driver of the second vehicle, and in the attention-calling control, the second vehicle control portion performs an attention call of contents at an attention-calling level that is increased from an attention-calling level set in the delay ignoring control with an increase in the communication delay time.

3. The vehicle control system according to claim 2 , wherein in the attention-calling control, the second vehicle control portion performs the attention call of the contents at the attention-calling level that is increased from the attention-calling level set in the delay ignoring control with the increase in the communication delay time and with an increase in a vehicle speed of the first vehicle.

4. The vehicle control system according to claim 2 , wherein the attention-calling control is a control to output an attention-calling message for calling attention of the driver of the second vehicle while changing an output style so as to let the driver of the second vehicle more readily become aware of an output of the attention-calling message with the increase in the communication delay time.

5. The vehicle control system according to claim 1 , wherein the second time acquisition portion acquires a time at regular intervals and uses a latest time among acquired times as the second time when the reception determination portion determines that the first vehicle packet is received.

6. The vehicle control system according to claim 1 , wherein the first vehicle control device successively determines latest first vehicle track information and successively transmits the first vehicle packet including the latest first vehicle track information, the second vehicle control device includes a communication unit provided with the second vehicle reception portion, the reception determination portion, the second time acquisition portion, and the delay calculation portion separately from the second vehicle control portion, the reception determination portion notifies the second vehicle control portion of a state in which the first vehicle packet has not been received for a reference time or longer by transmitting a non-reception notice, and the second vehicle control portion sets an end condition to end the delay considering control while the second vehicle reception portion successively receiving the first vehicle packet, operates in the delay considering mode repetitively until the end condition is satisfied, and in response to a reception of the non-reception notice before the end condition is satisfied, determines that a failure in reception of the first vehicle packet is not attributed to a malfunction of the second vehicle reception portion and ends the delay considering mode to perform a packet non-receiving control that is preliminarily set.

7. The vehicle control system according to claim 1 , wherein the second vehicle control device includes a map storage portion in which a road map is stored, and the second vehicle control portion determines whether the first vehicle estimated track and the second vehicle estimated track cross with each other, determines whether a crossing point of the first vehicle estimated track and the second vehicle estimated track is on an interchange based on the road map stored in the map storage portion when determining that the first vehicle estimated track and the second vehicle estimated track cross with each other, and determines that there is the possibility of the collision between the first vehicle and the second vehicle when determining that the crossing point is not on an interchange.

8. A vehicle control device used in a vehicle, comprising: a reception portion receiving a peripheral vehicle packet that is a vehicle packet transmitted from a peripheral vehicle in a periphery of a subject vehicle using the vehicle control device and including peripheral vehicle information based on which the vehicle control device starts a vehicle control against the peripheral vehicle and a first time indicating a time when the peripheral vehicle information is generated; a reception determination portion acquiring a signal received by the reception portion and determining whether the peripheral vehicle packet is received; a second time acquisition portion acquiring a second time indicating a time when the reception determining portion determines that the peripheral vehicle packet is received; a delay calculation portion calculating a communication delay that is a difference between the first time included in the peripheral vehicle packet received by the reception portion and the second time acquired by the second time acquisition portion; and a vehicle control portion performing a delay considering control that is set by changing a delay ignoring control based on the communication delay time, the delay ignoring control being the vehicle control set based on the peripheral vehicle information when assuming that the first time and the second time are same, wherein the vehicle control portion determines a surrounding vehicle estimated track that is a feature track of the surrounding vehicle based on surrounding vehicle track information included in the surrounding vehicle packet received by the reception portion and being information for determining the surrounding vehicle estimated track, determines a subject vehicle estimated track that is a feature track of the subject vehicle, determines whether there is a possibility of a collision between the surrounding vehicle and the subject vehicle based on the surrounding vehicle estimated track and the subject vehicle estimated track, and operates in a delay considering mode in which the subject vehicle control portion is allowed to perform the delay considering control in response to a determination that there is the possibility of the collision between the surrounding vehicle and the subject vehicle.

9. A vehicle control device used in a vehicle, comprising: a reception portion receiving a peripheral vehicle packet that is a vehicle packet transmitted from a peripheral vehicle in a periphery of a subject vehicle using the vehicle control device and including peripheral vehicle information based on which the vehicle control device starts a vehicle control against the peripheral vehicle and a first time indicating a time when the peripheral vehicle information is generated; a reception determination portion acquiring a signal received by the reception portion and successively determining whether the peripheral vehicle packet is received; a second time acquisition portion acquiring a second time indicating a time when the reception determination portion determines that the peripheral vehicle packet is received; a delay calculation portion calculating a communication delay that is a difference between the first time included in the peripheral vehicle packet received by the reception portion and the second time acquired by the second time acquisition portion; a delay time output portion outputting the communication delay time calculated by the delay calculation portion to a vehicle control portion that is used in the subject vehicle and performs a control determined based on the peripheral vehicle information; and a vehicle control portion performing a delay considering control that is set by changing a delay ignoring control based on the communication delay time, the delay ignoring control being the vehicle control set based on the peripheral vehicle information when assuming that the first time and the second time are same, wherein the second time acquisition portion acquires a time at regular intervals and uses a latest time among acquired times as the second time when the reception determination portion determines that the surrounding vehicle packet is received.

10. A vehicle control system comprising: a first vehicle control device used in a first vehicle; and a second vehicle control device used in a second vehicle, wherein the first vehicle control device includes, a first vehicle information acquisition portion acquiring first vehicle information based on which the second vehicle control device in the second vehicle starts a vehicle control against the first vehicle, a vehicle packet generation portion acquiring a first time indicating a time when the first vehicle information is acquired and generating a first vehicle packet including the first time and the first vehicle information, and a first vehicle transmission portion transmitting the first vehicle packet, the second vehicle control device includes, a second vehicle reception portion receiving the first vehicle packet, a reception determining portion acquiring a signal received by the second vehicle reception portion and successively determining whether the first vehicle packet is received, a second time acquisition portion acquiring a second time indicating a time when the reception determining portion determines that the first vehicle packet is received, a delay calculation portion calculating a communication delay time that is a difference between the first time included in the first vehicle packet received by the second vehicle reception portion and the second time acquired by the second time acquisition portion, and a second vehicle control portion performing a delay considering control that is set by changing a delay ignoring control based on the communication delay time, the delay ignoring control being the vehicle control set based on the first vehicle information when assuming that the first time and the second time are same, and the second time acquisition portion acquires a time at regular intervals and uses a latest time among acquired times as the second time when the reception determination portion determines that the first vehicle packet is received.